Gaia DR2 and EDR3 data and evolutionary status of post-AGB stars with high radial velocities

被引：1

作者：

Aoki, Wako ^{[1
,2
]}

Matsuno, Tadafumi ^{[3
]}

Parthasarathy, Mudumba ^{[1
,4
,5
]}

机构：

[1] Natl Astron Observ, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[2] Grad Univ Adv Studies SOKENDAI, Sch Phys Sci, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[3] Univ Groningen, Kapteyn Astron Inst, Landleven 12, NL-9747 AD Groningen, Netherlands

[4] Indian Inst Astrophys, 2 Block, Bangalore 560034, Karnataka, India

[5] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2022年 / 74卷 / 06期

关键词：

stars: AGB and post-AGB; stars: distances; stars: evolution; INFRARED IRAS EXCESS; GIANT BRANCH STARS; CHEMICAL-COMPOSITION; GALACTIC PLANE; METAL-POOR; PHOTOMETRY; MASS; KINEMATICS; EMISSION; ORIGINS;

D O I：

10.1093/pasj/psac074

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using the Gaia Data Release 2 (DR2) and Early Data Release 3 (EDR3) data and list of post-AGB candidates, we investigate the parallax, proper motion, and binarity for 20 post-AGB stars and candidates that have high radial velocities. From their Gaia distances, their luminosities and kinematics are derived. The evolutionary status of these stars is discussed from their location on the post-AGB evolutionary tracks. Nine stars are confirmed to be post-AGB stars that have initial main-sequence masses of around one or two solar masses. From their kinematics information, two objects among them are identified to belong clearly to the halo population, suggesting low mass. We discuss the origin and evolutionary status of other objects in the sample of this work with high radial velocities.

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收藏

页码：1368 / 1377

页数：10

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